Service engine light on 96 Buick Century

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Old 08-09-07, 07:41 PM
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Service engine light on 96 Buick Century

I have a 96 Buick Century with only 83,000 miles on it. Yesterday the "Service engine soon" light came on and has stayed on. I took it to Autozone where you can get a free code reading for cars 96 and newer. The associated told me the code identified a vacuum leak and the ev canister, but told me the ev canisters do not go bad. I spent some time this evening looking for the obvious-a loose hose connection or an obvious hole in a hose. Did not find anything. Both hoses to the ev canister are secure and look ok. Three questions I am wondering if someone can help with:

Could it be the ev canister anyway?
Any common places or hoses to look for a hole or crack?
What is the easiest way for a back yard mechanic to check for a vacuum leak?

Thanks!!
 
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Old 08-09-07, 07:43 PM
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Have you checked your gas cap? If it's cracked, missing, etc it will throw a EVAP code.

And yes, a cannister can go bad.
 
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Old 08-10-07, 11:53 AM
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It's cheaper and easier to replace all vacuum lines because once one goes others are not far behind but to check them get a spray bottle and spray the lines when you see the bubbles thats the leak. good luck
 
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Old 08-10-07, 03:06 PM
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It's cheaper and easier to replace all the lines instead of checking the gas cap?
 
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Old 08-10-07, 07:30 PM
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95% of the time it's the gas cap.
 
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Old 08-12-07, 07:18 PM
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I have replaced the gas cap and two vacuum hoses that were badly worn. One did look like it had a small hole. Still have the "service engine light". Any other suggestions?
 
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Old 08-12-07, 07:42 PM
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How long since you did this? Sometimes it takes the CEL many many miles to shut off.
 
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Old 08-12-07, 08:47 PM
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Go back to Autozone and have them clear the codes. Drive car as you normally would, and see if check engine comes back on.
 
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Old 08-14-07, 12:06 AM
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It can take a few on/off cycles for the light to go out
Or it can be reset with a scan tool

If it's been a while (a dozen or so on/off cycles), then look for another problem
 
 

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